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A sebaceous cyst is a term for various types of cysts that contain keratin or sebum, often found on the scalp, face, or back. Learn about the causes, symptoms, and surgical options for sebaceous cysts, and the difference between epidermoid and pilar cysts.
A nodule is a small firm lump in skin or other organs, usually greater than 1 cm in diameter. Learn about the characteristics, evaluation and conditions of nodules, such as dermatofibroma, pyogenic granuloma, lung nodule and thyroid nodule.
A renal cyst is a fluid collection in or on the kidney that can be benign or malignant. Learn about the Bosniak classification system, the imaging and histopathology features, and the management options for different types of renal cysts.
A thyroglossal cyst is a fibrous cyst that forms from a persistent thyroglossal duct, a remnant of thyroid gland development. It can cause a midline neck mass that moves with swallowing or tongue protrusion, and may be associated with ectopic thyroid tissue or infection.
Beckwith–Wiedemann syndrome (/ ˈ b ɛ k ˌ w ɪ θ ˈ v iː d ə. m ə n /; abbreviated BWS) is an overgrowth disorder usually present at birth, characterized by an increased risk of childhood cancer and certain congenital features.
Pleomorphic adenoma is a common benign salivary gland tumor that can arise in the parotid gland. It is characterized by variable histological features, low malignant potential, and can be diagnosed by tissue sampling and imaging studies.
A thyroid nodule is a raised area of tissue or fluid within the thyroid gland, which may be benign or malignant. Learn about the signs, symptoms, causes, diagnosis and treatment of thyroid nodules, including ultrasound, biopsy and surgery.
A soft-tissue sarcoma (STS) is a type of cancer that develops in soft tissue, such as muscle, fat, or blood vessels. Learn about the types, symptoms, causes, diagnosis, and treatment of STS from this comprehensive article.